Heliospheric Boundary and the TeV Cosmic Ray Anisotropy

Type Journal Article
Names Paolo Desiati, Alex Lazarian
Publication Journal of Physics Conference Series
Volume 531
Issue 1
Pages 012011
Journal Abbreviation Journal of Physics Conference Series
Date August 1, 2014
DOI 10.1088/1742-6596/531/1/012011
ISSN 1742-6588
URL http://adsabs.org/2014JPhCS.531a2011D
Library Catalog adslabs.org
Abstract Observations over the last few decades have shown that cosmic rays have a small non uniform distribution in arrival direction. Such anisotropy appears to have a roughly consistent topology between 10's GeV and 100's TeV, with a smooth energy dependency on phase and amplitude. However, above a few 100's TeV a sudden change in the topology of the anisotropy is observed. The cosmic ray arrival directions are expected to depend on the distribution of their sources in the Milky Way, as well as on effects arising from propagation in the inhomogeneous and turbulent interstellar magnetic field. In particular, in the 1-10 TeV energy range, the gyroradius of cosmic ray particles, much smaller that the injection scale of interstellar magnetic field turbulence, is comparable to the size of the heliosphere. Resonant scattering processes of cosmic ray particles propagating through the heliosphere may be able to induce a redistribution of the small anisotropic component of their flux. In this paper we discuss on the processes that occurs to TeV cosmic rays in the heliosphere and on the possibility to probe the heliospheric magnetic fields on large scale by studying the arrival distribution of cosmos rays.
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